Title: Unit 9 Glossary
Course: ELT 260 Introduction to Hydropower > Section: ELT 260 Introduction to Hydropower

Unit 9 Glossary

Terms

Term | Definitions
Blades or bucket | the rotating part of the runner that water acts on to convert energy.   Blades are shaped more like a propeller blade. Buckets are shaped closer to a cup shape.
Exit valve or Discharge | is the path by which water can exit the turbine.
Impulse turbine | the force of a fast moving fluid striking the blades that makes the rotor spin.
Intake shaft or structure | is the pipe (path) that is used to bring (withdraw) the water from a river, stream or reservoir then feed it into the turbine.
Main Shaft | is a shaft that  goes from the turbine to the generator (rotor) and is fitted with the runner on one end and connects to the generator on the other end.
Reaction Turbine | the rotor turns primarily as a result of the weight or pressure of a fluid on the blades.
Runner | is a circular disc on the periphery of which a number of buckets or blades are evenly space and fixed.
Turbine | also called turbomachine -  is a rotary mechanical device that extracts energy from a fluids flow and converts it into useful work. The useful work is typically to turn the generator.
Water Nozzles | used to control speed of the turbine or to stop rotation of turbine.  They may be of a flow or brake type nozzle which is typically only found on impulse turbines.
Wickets Gates | movable gates that control water flow over the turbines blades.